test: add examples/winprops.js fixture (legacy imports.* style documentation)

Author: ZviBaratz

tests/fixtures/examples-exclusion@test/examples/winprops.js

@@ -0,0 +1,16 @@
+// Example: customize window properties for PaperWM
+// This file uses the old imports.* API for GNOME 44 compatibility.
+// It is NOT part of the extension runtime.
+const GLib = imports.gi.GLib;
+const Meta = imports.gi.Meta;
+const Shell = imports.gi.Shell;
+const St = imports.ui.st;
+
+// Example: make terminal windows always float
+function init(ext) {
+    ext.winprops.forEach(function(p) {
+        if (p.wm_class === "Alacritty") {
+            p.float = true;
+        }
+    });
+}